﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExamlpeClass
{
    class CRectangle{
        int width;
        int height;
        public CRectangle(int a,int b){
            width = a;
            height = b;
        }
        public int area(){
            return(width*height);
        }
    }
        class program
        {
        static void Main(string[] args)
        {
            CRectangle recta=new CRectangle(3,4);
            CRectangle rectb=new CRectangle(5,6);
            Console.WriteLine("rect a:{0}",recta.area());
            Console.WriteLine("rect b:{0}", rectb.area());
        }
    }
}
